Blue, Green, Purple, Red and Yellow CATs Service Disruption Thu 04 Dec From 2.00pm on Thursday 4 December until further notice, Blue, Green, Purple, Red and Yellow CATs will be disrupted due to an incident on the Mandurah Line. These routes will operate at reduced frequencies until further notice. Passengers are encouraged to check the list of alternative bus routes or use the JourneyPlanner to plan your journey. If you require assistance regarding service disruptions or planning your journey, please call the Transperth InfoLine on 13 62 13 (TIS: 13 14 50). Hearing or speech impaired? Call via NRS 133 677 and ask for 13 62 13.